Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net earnings	$ 1,017	$ 736	$ 2,285	$ 1,399
Other comprehensive income (loss) before income taxes:
Unrealized foreign currency translation gains (losses) during period	76	(25)	8	(115)
Unrealized gains (losses) on investment securities:
Unrealized holding gains (losses) on investment securities during period	1,430	114	1,435	(22)
Reclassification adjustment for realized (gains) losses on investment securities included in net earnings	(213)	(173)	284	1,070
Unrealized gains (losses) on derivatives during period	2	0	(6)	(38)
Pension liability adjustment during period	(33)	(15)	(30)	(11)
Total other comprehensive income (loss) before income taxes	1,262	(99)	1,691	884
Income tax expense (benefit) related to items of other comprehensive income (loss)	347	(215)	569	86
Other comprehensive income (loss), net of income taxes	915	116	1,122	798
Total comprehensive income (loss)	$ 1,932	$ 852	$ 3,407	$ 2,197